API RP 581 - 3rd Ed.2016 - Add.2-2020 - Risk-Based Inspection Methodology

RISK-BASED INSPECTION METHODOLOGY, PART 2, ANNEX 2.B—DETERMINATION OF CORROSION RATES 2.B-45
Table 2.B.5.2—H 2 SO 4 Corrosion—Estimated Corrosion Rate for Carbon Steel (mpy)
Acid
Conc
(wt%)
Acid
Temp
(°F)
Acid Velocity (ft/s)
0 1 2 3 4.5 6.5 8.5 11.5 12
42 5 7 9 12 45 60 75 95 120
100
59.5 12 14 17 20 65 85 110 140 170
91 50 55 60 70 270 360 450 580 720
122.5 100 150 200 300 999 999 999 999 999
42 4 6 8 10 35 45 60 75 90
98
59.5 5 10 15 20 80 110 140 180 220
91 15 25 40 60 290 390 490 640 780
122.5 40 80 120 250 999 999 999 999 999
42 8 10 12 15 60 80 110 130 160
96
59.5 15 20 25 40 170 220 270 350 430
91 25 40 60 100 500 650 820 999 999
122.5 50 100 200 500 999 999 999 999 999
42 10 15 20 25 120 160 200 260 330
93.5
59.5 20 25 40 70 340 450 570 740 910
91 30 40 75 130 640 850 999 999 999
122.5 60 120 250 600 999 999 999 999 999
42 15 25 45 70 320 430 540 710 870
91
59.5 25 40 80 120 700 940 999 999 999
91 35 60 100 200 940 999 999 999 999
122.5 70 150 300 800 999 999 999 999 999
42 20 30 50 80 380 500 630 810 999
87
59.5 30 160 300 420 690 920 999 999 999
91 45 450 850 999 999 999 999 999 999
122.5 80 999 999 999 999 999 999 999 999
42 20 25 35 45 210 280 350 460 570
83
59.5 30 50 100 150 680 910 999 999 999
91 40 100 200 400 999 999 999 999 999
122.5 80 200 400 999 999 999 999 999 999
42 15 20 20 25 110 150 190 250 300
78
59.5 20 40 70 120 570 760 950 999 999
91 30 60 120 250 999 999 999 999 999
122.5 60 120 300 900 999 999 999 999 999